EP3046947A1 - Verzweigte polyethercarbonatpolyole und verfahren zu deren herstellung - Google Patents
Verzweigte polyethercarbonatpolyole und verfahren zu deren herstellungInfo
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- EP3046947A1 EP3046947A1 EP14771243.4A EP14771243A EP3046947A1 EP 3046947 A1 EP3046947 A1 EP 3046947A1 EP 14771243 A EP14771243 A EP 14771243A EP 3046947 A1 EP3046947 A1 EP 3046947A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2603—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen
- C08G65/2606—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups
- C08G65/2609—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups containing aliphatic hydroxyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/02—Aliphatic polycarbonates
- C08G64/0208—Aliphatic polycarbonates saturated
- C08G64/0216—Aliphatic polycarbonates saturated containing a chain-terminating or -crosslinking agent
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4891—Polyethers modified with higher fatty oils or their acids or by resin acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/20—General preparatory processes
- C08G64/32—General preparatory processes using carbon dioxide
- C08G64/34—General preparatory processes using carbon dioxide and cyclic ethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2603—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen
- C08G65/2606—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds the other compounds containing oxygen containing hydroxyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2642—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds characterised by the catalyst used
- C08G65/2645—Metals or compounds thereof, e.g. salts
- C08G65/2663—Metal cyanide catalysts, i.e. DMC's
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
- C08G65/2696—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds characterised by the process or apparatus used
Definitions
- the present invention relates to a process for preparing branched polyethercarbonate polyols comprising the step of reacting an alkylene oxide and carbon dioxide with an H-functional initiator compound in the presence of a catalyst, wherein the reaction is further carried out in the presence of a branching compound having a ring-polymerizable functional group and comprises an H-functional group. It furthermore relates to a polyethercarbonate polyol which can be prepared by the process according to the invention and crosslinked polyethercarbonate polymers based thereon.
- R CIL propylene carbonate
- US 2010/0048935 A1 describes a process for preparing polyethercarbonate polyols by reacting alkylene oxides and carbon dioxide with H-functional starter compounds by means of a DMC catalyst in which one or more initiator compounds are initially charged in a reactor and, furthermore, one or more initiator compounds be metered in the course of the reaction.
- a possible alkylene oxide epoxidized soybean oil is mentioned.
- the Reactivity of these oxirane rings is low because they are inside a chain and are sterically strongly shielded. Therefore, the epoxidized soybean oil is reacted more slowly than conventional monomers, such as propylene oxide, and accumulates in the reaction mixture. Since epoxidized soybean oil is also a mixture of multiply epoxidized compounds, it is not possible to structure defined polymer architectures.
- WO 2006/103213 A1 in contrast, describes a process for the preparation of polyethercarbonate polyols with improved incorporation of C 0- into the polyethercarbonate polyol using a catalyst comprising a multimetal cyanide.
- the document discloses the presence of an H-functional initiator compound, an alkylene oxide and carbon dioxide in the presence of the multimetal cyanide component in a reactor.
- the document discloses the presence of a CO; -phile. Substance or CO; -philic substituent.
- the CO 2 - phile substance or the CO.-phile substituent should facilitate the incorporation of the CO: into the polyethercarbonate polyol and thus reduce the formation of cyclic alkylene carbonates, such as, for example, propylene carbonate, which are undesirable by-products.
- WO 2012/130760 mentions the use of higher-functionality alcohols as starter compound in the reaction of alkylene oxides with CO 2 to form polyether carbonates with catalysis with double metal cyanides (DMC).
- DMC double metal cyanides
- Polyethercarbonate polyols prepared with higher functional starter compounds have a viscosity which increases with the same OH number.
- EP 12181907 describes a significantly increased viscosity (36.0 Pa.s) for a polyethercarbonate obtained using glycerol as a tri-functional initiator compound in comparison with a polyethercarbonate obtained using dipropylene glycol as a difunctional initiator compound (4 , 1 Pa.s).
- glycidol as a comonomer in the preparation of polyethers is described for example in GB 586520.
- a polymer described therein may be a copolymer of an alkylene oxide and glycidol and optionally a glycidyl ester of a fatty acid or a polycarboxylic acid.
- catalysts for the preparation of such polyether acidic compounds preferably sulfonic acids are used.
- C O; as a comonomer is not named.
- the functionality of the Polyethercarbonatpoiyole obtained is determined by the functionality of the alcohol used as a starter compound.
- Such starter compounds often need to be synthesized in a separate step.
- the synthesis of the starter compounds from a low molecular weight polyalkoliol and an alkylene oxide is usually carried out using bases as a catalyst.
- bases as a catalyst.
- these starter compounds Before using these starter compounds in a catalysis with DMC catalysts, they must be extensively purified from basic catalyst residues in order to obtain a To avoid deactivation of the catalyst. However, the viscosity of the products obtained is often increased nevertheless.
- the object of the present invention is to provide such a method. According to the invention, this object is achieved by a process for preparing branched polyethercarbonate polyols, comprising the step of reacting an alkylene oxide and carbon dioxide with an H-functional initiator compound in the presence of a catalyst, wherein the reaction is further carried out in the presence of a branching compound which is a ring-opening polymerizable functional Group and an H-functional group, and wherein the branching compound is added during the reaction such that the proportion of the branching compound in the obtained reaction mixture at any time during the addition is ⁇ 7.5% by weight based on the amount of added at that time H-functional starter compound, alkylene oxide and branching compound.
- branched polyether carbonate polyols can be prepared, wherein the incorporation of a branching molecule during the polymerization reaction leads in each case to a branching of the polymer chain with introduction of a further functional end group.
- Gelling of the reaction mixture can be avoided by employing branching compounds which comprise exactly one ring-opening polymerizable functional group and at least one H-functional group per molecule.
- the average functionality of the polyethercarbonate polyol obtained can be adjusted by the amount of the branching compound used.
- the resulting polyether carbonate polyols have a surprisingly low viscosity and a high reactivity of the H-functional (Zerewitinoff-active) end groups with respect to isocyanates.
- Suitable alkylene oxides are, for example, one or more compounds selected from the group consisting of ethylene oxide, propylene oxide, 1-butoxide, 2,3-butene oxide,
- Decene oxide 1-undecenoxide, 1-dodecene oxide, 4-methyl-1, 2-pentenoxide, butadiene monoxide, isoprene monoxide, cyclopentene oxide, cyclohexene oxide, cycloheptenoxide, cyclooctene oxide, styrene oxide, methylstyrene oxide, pinene oxide, monoxidized epoxidized fats as mono-, di- and triglycerides, single epoxidized fatty acids, C1-C24 esters of mono-epoxidized fatty acids, mono-epoxidized derivatives of glycidol such as methyl glycidyl ether, ethyl glycidyl ether, 2-ethylhexyl glycidyl ether, allyl glycidyl ether, glycidyl methacrylate and epoxy functional alkyoxysienes such as 3-glycidy
- H-functional starter compounds compounds with active for the alkoxylation H atoms can be used.
- the alkoxylation active groups having active H atoms are, for example, -OH, -NH; (primary amines), -NH- (secondary amines), -SH and -COH, preferred are -OH and NH.% is particularly preferred -OH.
- the H-functional initiator compound for example, one or more compounds selected from the group consisting of monohydric or polyhydric alcohols, polyhydric amines, polyhydric thioie, amino alcohols, thioalcohols.
- polyether polyols polyether polyols
- polyester polyols polyester ether polyols
- polyether carbonate polyols polycarbonate polyols
- polycarbonates polyethyleneimines
- polyetheramines such as so-called Jeffamine ® from Huntsman like D-230, D-400, D-2000, T-403, T-3000, T-5000 or corresponding BASF products such as Poiyetheramin D230, D400, D200, T403, T5000
- polytetrahydrofurans eg PolyTHF ® of BASF, such as PolyTHF ® 250, 650S, 1000, 1000S, 1400, 1800, 2000
- Polytetrahydrofuranamine BASF Product polytetrahydrofuran amine 1700
- polyether thiols polyacrylate polyols, castor oil, the mono- or digiyceride of ricinoleic acid, monoglycerides of fatty acids, chemically modified mono-, di- and /
- Suitable monofunctional amines are: butylamine, terf-butylamine, pentylamine, hexylamine, aniline, aziridine, pyrrolidine, piperidine, morpholine.
- mono-functional thiols can be used: ethanethiol, I -Propanthiol. 2-propanethiol, 1-butanethiol, 3-methyl-1-butanethiol, 2-buten-1-thiol, thiophenol.
- mono-functional carboxylic acids formic acid, acetic acid, propionic acid, butyric acid, fatty acids such as stearic acid, palmitic acid, oleic acid, linoleic acid, linolenic acid, benzoic acid, acrylic acid.
- polyfunctional alcohols suitable for H-functional starter compounds are dihydric alcohols (such as, for example, ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,3-propanol, 1,4-butanediol, 1,4-butenediol, 1,4-butynediol, neopentyl glycol, 1 , 5-pentanediol, methylpentanediols (such as 3-methyl-1,5-pentanediol), 1,6-hexanediol, 1,8-octanediol, 1, 10-decanediol, 1, 12-dodecanediol, bis (hydroxymethyl) - cyclohexanes (such as, for example, 1,4-bis (hydroxymethyl) cyclohexane), triethylene glycol, tetraethylene glycol, polyethylene glycols, dipropylene glycol, tripropylene
- the H-functional starter compounds may also be selected from the class of polyether polyols, in particular those having a molecular weight M n in the range from 100 to 4000 g / mol. Preference is given to polyether polyols which are composed of repeating ethylene oxide and propylene oxide units, preferably in an amount of from 35 to 100% of propylene oxide units, more preferably in a proportion of from 50 to 100% of propylene oxide units. These may be random copolymers, gradient copolymers, alternating or Biockcopolymere of ethylene oxide and propylene oxide.
- Suitable Poiyetherpolyole composed of repeating propylene oxide and / or ethylene oxide units are, for example Desmophen ® -, Acclaim ® -, Areol ® -, Baycoll ® -, Bayfill ® -, Bayflex ® - Baygal ® -, PET ® - and polyether polyols Bayer MateriaiScience AG (such as Desmophen ® 3600Z, Desmophen ® 1900U, Acclaim ® Polyol 2200 Acclaim ® Polyol 40001, Arcol ® Polyol 1004 Arcol ® Polyol 1010 Arcol ® Polyol 1030 Arcol ® Polyol 1070, Baycoll ® BD 1 1 10, Bayfill ® VPPU 0789, Baygal ® K55, PET ® 1004 polyether ® S180).
- suitable homo-polyethylene oxides are BASF SE example Pluriol® ® E grades
- suitable homo-polypropylene oxides are, for example Pluriol® ® BASF SE P grades.
- suitable mixed copolymers to from ethylene oxide and propylene oxide such as the Pluronic ® PE or PLURIOL ® RPE trademarks of BASF SE.
- the H-functional starter compounds may also be selected from the class of substances of the polyesterpolyols, in particular those having a molecular weight Mn in the range from 200 to 4500 gmole.
- Polyester polyols used are at least difunctional polyesters. Preferably polyester polyols consist of alternating acid and Aikoholtechniken.
- the acid components used are, for example, succinic acid, maleic acid, maleic anhydride, adipic acid, phthalic anhydride, phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, tetrahydrophthalic anhydride, hexahydrophthalic anhydride or mixtures of the abovementioned acids and / or anhydrides.
- polycarbonate diols can be used as H-functional starter compounds, in particular those having a molecular weight M n in the range from 150 to 4500 g / mol, preferably 500 to 2500 g mol, for example by reaction of phosgene, dimethyl carbonate, diethyl carbonate or diphenyl carbonate and di functional alcohols or
- Polyester polyols or Po 1 y et herpo I yo 1 en be prepared.
- polycarbonates such as can be found in EP-A 1,359,177th example, as polycarbonate, the Desmophen ® C-
- Types of Bayer MaterialScience AG are used, such as Desmophen ® C 1 100 or Desmophen ® C 2200.
- polyethercarbonate polyols can be used as H-functional starter compounds.
- polyether carbonate polyols which are obtainable by the process according to the invention described here are used.
- These polyether carbonate polyols used as H-functional starter compounds are prepared beforehand in a separate reaction step for this purpose.
- the H-functional starter compounds generally have an OH functionality (ie number of H atoms per molecule active for the polymerization) of from 1 to 8, preferably from 2 to 6 and particularly preferably from 2 to 4.
- the H-functional starter compounds are used either individually or as a mixture of at least two H-functional starter compounds.
- H-functional starter compounds are alcohols of the general formula: HO- (CH 2 ) x-OH where x is a number from 1 to 20, preferably an integer from 2 to 20.
- Examples of alcohols according to the above formula are ethylene glycol, 1,4-butanediol, 1,6-hexanediol, 1,8-octanediol, 1, 10-decanediol and 1,12-dodecanediol.
- H-functional starter compounds are neopentyl glycol, trimethylolpropane, glycerol, pentaerythritol, reaction products of the alcohols according to the above formula with ⁇ -caprolactone, for example reaction products of trimethylolpropane with ⁇ -caprolactone, reaction products of glycerol with ⁇ -caprolactone, and reaction products of pentaerythritol with ⁇ caprolactone.
- H-functional starter compounds are water, diethylene glycol, dipropylene glycol, castor oil, sorbitol and polyether polyols composed of repeating polyalkylene oxide units, and polyether carbonate polyols.
- the H functinal starter compounds are particularly preferably one or more compounds selected from the group consisting of ethylene glycol, propylene glycol. 1, 3-Propandioi, 1, 3-butanediol, 1, 4-butanediol, 1, 5-pentanediol, 2-methylpropane-1, 3-diol. Neopentyl glycol, 1,6-hexanediol, diethylene glycol, dipropylene glycol, glycerol, trimethylolpropane, di- and tri-functional polyether polyols.
- polyether polyol comprises a di- or tri-H-functional starter compound and propylene oxide or a di- or tri-H-functional starter compound, propylene oxide and ethylene oxide, and di- and tri-functional polyether carbonate polyols, where the polyether carbonate polyol comprises a di- or tri-functional starter compound.
- H-functional starter compound, carbon dioxide and propylene oxide and / or ethylene oxide is constructed.
- the polyether polyols and polyether carbonate polyols preferably have an OH functionality of 2 to 4 and a molecular weight M n in the range of 62 to 4500 g mol and in particular a molecular weight M n in the range of 62 to 3000 g mol.
- a DMC catalyst double metal cyanide catalyst
- other catalysts for the copolymerization of alkylene oxides and CO such as zinc carboxylates or cobalt-Saien complexes are used.
- Suitable zinc carboxylates are, for example, zinc salts of carboxylic acids, in particular dicarboxylic acids, such as adipic acid or glutaric acid.
- the conversion to polyethercarbonate polyols is carried out further in the presence of a branching compound which comprises a ring-opening polymerizable functional group and an H-functional group.
- the branching compounds contain exactly one polymerisable group and at least one Zerewitinoff-active starter function. Then no gelling of the reaction mixture in the preparation of polyether carbonate is expected.
- ring-opening polymerizable functional groups in the branching compound are epoxides, oxetanes, aziridines, aliphatic lactones, aromatic lactones, lactides, cyclic carbonates having at least three optionally substituted methylene groups between the oxygen atoms of the carbonate group, aliphatic cyclic anhydrides and aromatic cyclic anhydrides.
- Suitable functional groups for the alkoxylation with active H atoms in the branching compound are in particular -OH. -NI L (primary amines), - NH- (secondary amines), -SH. -CO M and ⁇ -dicarbonyl compounds.
- the branching compound is added during the reaction such that the proportion of the branching compound in the obtained reaction mixture at any time during the addition is ⁇ 7.5% by weight based on the amount of H-functional initiator compound, alkylene oxide and Branching compound.
- This proportion is preferably from> 0.1% by weight to ⁇ 7.5% by weight, more preferably> 0.5% by weight, to ⁇ 7% by weight, and particularly preferably from> 1% by weight to ⁇ 5% by weight -%>.
- the branching compound is added so that the proportion of the branching compound in the obtained reaction mixture at any time is ⁇ 7.5% by weight based on the amount of H-functional starter compound present in the reactor at that time, polyethercarbonate polyol, alkylene oxide and Branching compound.
- This proportion is preferably> 0.1% by weight> to ⁇ 7.5% by weight, more preferably> 0.5% by weight> to ⁇ 7% by weight, and particularly preferably> 1% by weight> to ⁇ 5% by weight o.
- the average number of branching points per polyethercarbonate polyol molecule results from the functionality and the molar ratio of the branching compound used Starter compound.
- the amount of branching compound is selected such that the arithmetically determined average functionality F of the branched polyethercarbonate polyol 2 obtained is ⁇ F ⁇ 22, preferably 2 ⁇ F ⁇ 1 and more preferably 2 ⁇ F ⁇ 4
- Starter compound and a branching compound containing exactly one polymerizable group and exactly one Zerewitinoff active starter function this corresponds to an average incorporation of 1 -21 moles of the branching compound per mole of macromolecules, preferably 1-10 moles of the branching compound per mole of macromolecules, and more preferably of 1
- a bifunctional initiator compound and a branching compound containing exactly one polymerisable group and exactly one Z ewitinoff-active starter function this corresponds to an average incorporation of 0-20 moles of the branching compound per mole of macromolecule romolekülen,
- This amount of branching compound has proven to be particularly suitable for obtaining a relatively high functionality of the polyethercarbonate polyol molecules at a moderate to low viscosity of the polyethercarbonate polyols.
- the low viscosity of the higher-functionality polyethercarbonate polyols obtainable by the process according to the invention also ensures good processability of the polymers with, for example, rapid reactions in the context of further crosslinking reactions. These stated ranges of average functionality may thus contribute to preferred mechanical properties of the moldings or layers obtainable therefrom.
- the ratio of branching compound to initiator compound in the branched polyethercarbonate polyol can be determined, for example, by NMR spectroscopy and analysis of intensities of characteristic signals for incorporated branching compound and extended initiator compound. Embodiments and further aspects of the present invention are explained below. They can be combined with each other as long as the opposite does not result from the context.
- At least one of the branching compounds can satisfy the following formula:
- R is hydrogen, C1-C22 alkyl, cycloalkyl, aralkyl, aryl, X is a chemical bond or a di- or higher valent, heteroatom-containing or non-heteroatom-containing C1-C22 aliphatic, cycloaliphatic, araliphatic or aromatic radical and
- n is an integer> 1.
- at least one of the branching compounds may have the following formula:
- At least one of the branching compounds may correspond to the following formula:
- R is hydrogen, C1-C22 alkyl.
- R is hydrogen, C1-C22 alkyl.
- R is hydrogen, C1-C22 alkyl.
- X is a chemical bond or a di- or higher valent, heteroatom-containing or not
- R 1 , R 2 , R ⁇ R 4 , R 5 are each independently hydrogen, C 1 -C 22 alkyl, cycloalkyl, aralkyl.
- Ar 1 and R 1 , R 2 , R ", R ' R 5 optionally contain heteroatoms
- R 1 , R 1 , R 4 is hydrogen and R 3 is methyl or ethyl, in one embodiment of the process according to the invention this the steps:
- step ( ⁇ ) metering in carbon dioxide, the alkylene oxide and the branching compound, furthermore, in the event that no H-functional starter compound was introduced in step (a), step ( ⁇ ) comprises metering in the H-functional starter compound.
- this embodiment further comprises the step ( ⁇ ) between step (a) and step ( ⁇ ):
- step ( ⁇ ) metering in an alkylene oxide which is the same or different from the alkylene oxide used in step ( ⁇ ).
- the DMC catalyst is preferably used in an amount such that the content of D MC catalyst in the resulting polyether carbonate polyol is 10 to 10,000 ppm. more preferably 20 to 5000 ppm and most preferably 50 to 500 ppm.
- the DMC catalyst may be added in solid form or as a suspension in a suspending agent containing no H-functional groups and / or an H-functional initiator compound. The addition of the suspending agent and / or the H-functional initiator compound may occur before, simultaneously with or after the addition of the DMC catalyst.
- an inert gas for example nitrogen or a noble gas such as argon
- an inert gas through the reactor at a temperature of 50 to 200 ° C, preferably from 80 to 160 ° C, more preferably from 125 to 135 ° C.
- Carbon dioxide mixture or carbon dioxide passed and simultaneously by removing the inert gas or carbon dioxide (for example with a pump) a reduced pressure (absolute) of 10 mbar to 800 mbar, preferably from 40 mbar to 200 mbar in the reactor.
- the suspending agents used in step (a) to suspend the DMC catalyst do not contain H-functional groups.
- Suitable suspending agents are all polar aprotic, weakly polar aprotic and nonpolar aprotic solvents, which each contain no H-functional groups. As suspending agent, it is also possible to use a mixture of two or more of these suspending agents.
- polar aprotic solvents 4-methyl-2-oxo-1,3-dioxolane (also referred to below as cyclic propylene carbonate), 1,3-dioxolan-2-one, acetone, methyl ethyl ketone, acetonitrile , Nitromethane, dimethylsulfoxide, sulfolane, dimethylformamide, dimethylacetamide and N-methylpyrrolidone.
- un polar and weak polar aprotic solvents include, for example, Et. such as dioxane, diethyl ether, methyl tert-butyl ether and tetrahydrofuran, esters, such as ethyl acetate and butyl acetate,
- Hydrocarbons such as e.g. Pentane, n-hexane, benzene and alkylated benzene derivatives (e.g., toluene, xylene, ethylbenzene) and chlorinated hydrocarbons such as, chloroform, chlorobenzene, dichlorobenzene and carbon tetrachloride.
- Preferred suspending agents are 4-methyl-2-oxo-1,3-dioxolane, 1,3-dioxo-an-2-one, toluene, xylene.
- Ethylbenzene, chlorobenzene and dichlorobenzene and mixtures of two or more of these suspending agents used particularly preferably 4-methyl-2-oxo-l, 3-dioxolane and l, 3-dioxolan-2-one or a mixture of 4-methyl-2 oxo-1, 3-dioxolane and 1,3-dioxolan-2-one.
- suspending agents used in step (o) to suspend the DMC catalyst are one or more compounds selected from the group consisting of aliphatic lactones, aromatic lactones, lactides, cyclic carbonates having at least three, if appropriate substituted methylene groups between the oxygen atoms of the carbonate group, aliphatic cyclic anhydrides and aromatic cyclic anhydrides.
- such suspending agents are incorporated into the polymer chain later in the course of the polymerization in the presence of a starter compound. This eliminates downstream cleaning steps.
- Aliphatic or aromatic lactones are cyclic compounds containing an ester bond in the ring.
- Preferred compounds are 4-membered ring lactones such as ⁇ -propiolactone, ⁇ -butyrolactone, ⁇ -isovalerolactone, ⁇ -caprolactone, ⁇ -isocaprolactone, ⁇ -methyl- ⁇ -valerolactone, 5-membered ring lactones, such as ⁇ -butyrolactone, ⁇ -valerolactone, 5-methylfuran-2 (3H) -one, 5-methylidenedihydrofuran-2 (3H) -one, 5-hydroxyfuran-2 (5H) -one, 2-benzofuran-1 (3H) -one and 6-methyl-2-one benzofuran-1 (3H) -one, 6-membered ring lactones such as ⁇ -valerolactone, 1,4-dioxan-2-one, dihydrocoumarin, 1H-isochromen-1-one, 8H-pyr
- 7-membered ring lactones such as ⁇ -caprolactone, 1,5-dioxepan-2-one, 5-M et al lox epa n -2 -one.
- 55.75 -5-methyl 1-7-1-propan-2-yl K xepan-2-one.
- Lactides are cyclic compounds containing two or more ester bonds in the ring.
- Preferred compounds are glycolide (1,4-dioxane-2,5-dione), L-lactide (L-3,6-dimethyl-1,4-dioxane-2,5-dione), D-lactide, DL-lactide , Mesolactide and 3-methyl-l, 4-dioxane-2,5-dione, 3-hexyi-6-methyl-1,4-dioxane-2,5-dione, 3,6-di (but-3-ene -l -yl) -l, 4-dioxane-2,5-dione (each including optically active forms). Particularly preferred is L-lactide.
- the cyclic carbonates used are preferably compounds having at least three optionally substituted methylene groups between the oxygen atoms of the carbonate group.
- Preferred compounds are trimethylene carbonate, neopentyl glycol carbonate (5,5-dimethyl-1,3-dioxan-2-one), 2,2,4-trimethyl-1, 3-pentanediol carbonate, 2,2-dimethyl-1,3-butanediol carbonate, 1,3-butanediol carbonate, 2-methyl-1,3-propanediol carbonate, 2,4-pentanediol carbonate, 2-methyl-butane-1,3-diol carbonate, TMP monoallyl ether carbonate, pentaerythritol diallyl ether carbonate, 5- (2-hydroxyethyl) -1,3 dioxan-2-one, 5- [2- (benzyloxy) ethyl] -1,3-dioxan-2-one, 4-
- Cyclic carbonates having less than three optionally substituted methylene groups between the oxygen atoms of the carbonate group are under the conditions of the inventive
- cyclic carbonates with less than three optionally substituted methylene groups between the oxygen atoms of the carbonate group can be used together with other suspending agents.
- Preferred cyclic carbonates having less than three optionally substituted methylene groups between the oxygen atoms of the carbonate group are ethylene carbonate, propylene carbonate, 2,3-butanediol carbonate, 2,3-pentanediol carbonate, 2-methyl-1,2-propanediol carbonate, 2,3-dimethyl-2, 3-butanediol.
- Cyclic anhydrides are cyclic compounds containing an anhydride group used in the ring.
- Preferred compounds are succinic anhydride, maleic anhydride, phthalic anhydride, 1,2-cyclohexanedicarboxylic anhydride, diphenic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, Norbornendiklareanhydrid and their chlorination products, succinic anhydride, glutaric anhydride, Diglykoiklareanhydrid, 1,8-naphthalic anhydride, succinic anhydride, Dodecenylbern steinklar eanhydrid, tetradecenyl succinic anhydride, Hexadecenylsuccinic anhydride, octadecenylsuccinic anhydride, 3- and 4-nitrophthalic anhydride, tetrachlorophthalic anhydride, te
- the amount of one or more alkylene oxides used in the activation in step ( ⁇ ) is 0, 1 to 25.0% by weight, preferably 1, 0 to 20.0% by weight, particularly preferably 5 to 16.0 wt .-% (based on the used in step (a) amount of suspending agent and / or H-functional starter compound).
- the alkylene oxide can be continuously metered into the reactor over a relatively long period of time, added in one step or in stages in several portions.
- an excess of carbon dioxide based on the calculated amount of incorporated carbon dioxide in the polyethercarbonate polyol is used because, due to the inertness of the carbon dioxide, an excess is advantageous.
- the amount of carbon dioxide can be determined by the total pressure at the respective reaction conditions. As the total pressure (absolute), the range of 0.01 to 120 bar, preferably 0.1 to 110 bar, particularly preferably 1 to 100 bar for the copolymerization for the production of higher polyether polycarbonate has proven to be advantageous. It is possible to feed the carbon dioxide continuously or discontinuously. This depends on how fast the alkylene oxides and the CO: are consumed and whether the product should optionally contain CO; -free polyether blocks or blocks with different CO content.
- the amount of carbon dioxide may also vary with the addition of the alkylene oxides.
- CO in gaseous, liquid or supercritical state to the reactor.
- CO 2 can also be added to the reactor as a solid and then converted to the gaseous, dissolved, liquid and / or supercritical state under the chosen reaction conditions.
- the alkylene oxides used in step ( ⁇ ) may be identical or different from the alkylene oxides used in step ( ⁇ ).
- the alkylene oxide can be metered into the reactor over a relatively long period of time, in one step or gradually added in several portions.
- the branching compound may be added dissolved in a solvent or in alkylene oxide, the concentration of which is 1 to 50% by weight, preferably 2 to 18% by weight, especially preferably 5 to 1 5 wt .-% is.
- Suitable solvents are the abovementioned polar aprotic, weakly polar aprotic and nonpolar aprotic solvents in which the branching compound is soluble.
- the branching compound can be added to pure substance, while at the same time the alkylene oxides are metered separately.
- the temperature in step (.gamma.) Can be> 90.degree. C. and ⁇ 130.degree.
- This temperature range for carrying out the polymerization reaction has proved to be particularly advantageous due to the process economy and the properties of the higher-functionality polyethercarbonate polyols obtainable in this way.
- the recoverable within this temperature range yields of branched polyether carbonate polyols are high and it is achieved almost complete conversion of monomers.
- the available branched polyethercarbonate polyols are characterized by a narrow molecular mass distribution and controllable functionality.
- the temperature in step ( ⁇ ) can also be> 95 ° C and ⁇ 1 15 ° C.
- the process according to the invention can be carried out continuously, in a semi-batch process or batchwise.
- the three steps ⁇ , ⁇ and ⁇ can be carried out in the same reactor or separately in different reactors.
- Particularly preferred reactor types are stirred tank, tubular reactor and loop reactor. If the reaction steps ⁇ , ⁇ and ⁇ are carried out in different reactors, a different type of reactor can be used for each step.
- Polyethercarbonatepolyols can be prepared in a stirred tank, wherein the stirred tank depending on the embodiment and operation over the reactor jacket, inside and / or located in a pumped circulating cooling surfaces is cooled. Both in the semi-batch application, in which the product is removed only after the end of the reaction, as well as in the continuous application, in which the product is removed continuously, pay particular attention to the metering rate of the alkylene oxide. It should be adjusted so that, despite the inhibiting effect of carbon dioxide, the alkylene oxides react quickly enough.
- the concentration of free alkylene oxides in the reaction mixture during the activation step (step ( ⁇ )) is preferably> 0 to 100% by weight, more preferably> 0 to 50% by weight, most preferably> 0 to 20% by weight ( in each case based on the weight of the reaction mixture).
- the concentration of free alkylene oxides in the reaction mixture during the copolymerization (steps ( ⁇ ) and ( ⁇ )) is preferably> 0 to 40 wt .-%, particularly preferably> 0 to 25 wt%, most preferably> 0 to 1 5 wt .-% (in each case based on the weight of the reaction mixture).
- a further possible embodiment of the invention for the copolymerization is characterized in that one or more H-functional starter compounds are added continuously to the reactor during the reaction.
- the amount of H-functional starter compounds which are continuously metered into the reactor during the reaction preferably at least 20 mol% equivalents, particularly preferably 70 to 95 mol% equivalents (in each case based on the total amount of H-functional starter compounds).
- the amount of H-functional starter compounds, which are added continuously during the reaction in the reactor preferably at least 80 mol% equivalents, more preferably 95 to 100 mol% equivalents (each based on the total amount of H - functional starter compounds).
- the catalyst-starter mixture activated according to steps (a) and ( ⁇ ) is further reacted in the same reactor with alkylene oxides, branching compound and carbon dioxide.
- the catalyst-starter mixture activated according to steps (o) and ( ⁇ ) in another reaction vessel for example, a
- the catalyst-starter mixture dried according to step (a) is reacted in another reaction vessel (for example a stirred tank, tubular reactor or loop reactor) according to steps ( ⁇ ) and ( ⁇ ) with alkylene oxides, branching compound and carbon dioxide implemented.
- another reaction vessel for example a stirred tank, tubular reactor or loop reactor
- the catalyst-starter mixture dried according to step (a) or the catalyst-initiator mixture activated according to steps (a) and ( ⁇ ) and optionally further starter compound and also alkylene oxides, branching compound and carbon dioxide are continuously passed through pumped a pipe.
- the activation according to step ( ⁇ ) takes place in the first part of the tubular reactor and the copolymerization according to step ( ⁇ ) in the second part of the tubular reactor.
- the molar ratios of the reactants vary depending on the desired polymer.
- carbon dioxide in its liquid or supercritical form is metered in here in order to allow optimum miscibility of the components.
- the carbon dioxide can be introduced into the reactor at the inlet of the reactor and / or via metering points which are arranged along the reactor.
- a portion of the alkylene oxide may be introduced at the entrance of the reactor.
- the residual amount of the alkylene oxide is preferably arranged over a plurality of metering points which are arranged along the reactor are introduced into the reactor.
- mixing elements are incorporated for better mixing of the reactants, as marketed, for example, by the company Ehrfeld Mikrotechnik BTS GmbH, or mixer heat exchanger elements which at the same time improve the mixing and heat dissipation. Preference is given to mixed by the mixing elements metered CO2 and / or alkylene oxide with the reaction mixture. In an alternative embodiment, different volume elements of the reaction mixture are mixed together.
- Scroll reactors can also be used to prepare polyethercarbonate polyols. These generally include reactors with internal and / or external material recycling (possibly with heat exchange surfaces arranged in the circulation), such as, for example, a jet loop reactor, jet loop reactor or venturi loop reactor, which can also be operated continuously, or a tubular reactor designed in a loop shape suitable devices for the circulation of the reaction mixture or a loop of a plurality of series-connected tubular reactors or a plurality of stirred kettles connected in series.
- reactors with internal and / or external material recycling possibly with heat exchange surfaces arranged in the circulation
- a jet loop reactor, jet loop reactor or venturi loop reactor which can also be operated continuously
- a tubular reactor designed in a loop shape suitable devices for the circulation of the reaction mixture or a loop of a plurality of series-connected tubular reactors or a plurality of stirred kettles connected in series such as, for example, a jet loop reactor, jet loop reactor or venturi loop reactor, which can also be operated continuously, or a
- the reactor in which step ( ⁇ ) is carried out can be followed by a further vessel or a tube ("dwell") in which residual concentrations of free alkylene oxides present after the reaction react in this downstream reactor at the same pressure as in the reactor in which the reaction step ( ⁇ ) is carried out, however, the pressure in the downstream reactor may also be chosen higher or lower
- the carbon dioxide after the reaction step ( ⁇ ) The temperature in the downstream reactor may preferably be 10 to 150 ° C. and preferably 20 to 100 ° C.
- the reaction mixture preferably contains at the end of the downstream reactor less than 0.05% by weight of alkyls monoxide.
- the addition of the branching compound in step ( ⁇ ) may occur during any times of alkylene oxide addition.
- the addition is over> 20%, preferably> 50%, more preferably over> 80% i and most preferably during the entire time of the alkylene oxide addition.
- slow addition of the branching compound avoids inhibition of the DMC catalyst.
- Ratio of the rate of addition of the alkylene oxide to the rate of addition of the branching compound at any point in the process of the invention > 2.5.
- This ratio is particularly preferably in the range> 2.5 and ⁇ 200, most preferably in the range from Range> 5.0 and ⁇ 100. Without being tied to a theory, it falls short of the
- the addition of the branching compound is completed before 50 mol% of the total amount of the alkylene oxide has been added in this reaction.
- Another further embodiment of the process according to the invention starts with the addition of the branching compound after 50 mol% of the total amount of the alkylene oxide in this
- the addition of the branching compound is preferably completed before more than half, preferably before more than a quarter of the alkylene oxides have been added ("early addition").
- This approach results in a more star-shaped molecular geometry with approximately equal length polymer chains between the incorporated branching molecules and As a consequence, this leads to a particularly low viscosity of the polyether carbonate polyols obtained and to lower gel points in a subsequent reaction with crosslinking reagents, such as, for example, the terminal OH groups and also exposed functional groups, for example OH groups, in the outer regions of the polymer structure isocyanates.
- Reaction Lead 2 The "Late Addition":
- Addition of the branching compound can also be made after more than half, optionally after more than three quarters of the alkylene oxides have been added ("late addition").
- Addition of the branching compound can also be made after more than half, optionally after more than three quarters of the alkylene oxides have been added ("late addition").
- the addition of the branching compound can occur during any times or throughout the entire time of A 1 alkylene oxide addition.
- egg-shaped polyethercarbonate polyol molecules having many branching parts can be obtained.
- step ( ⁇ ) is carried out continuously.
- step ( ⁇ ) it is possible for step ( ⁇ ) to comprise a continuous addition of the I I functional starter compound.
- the amount of H-functional starter compounds which are metered into the reactor continuously in step ( ⁇ ) is preferably at least 20 mol% equivalents, more preferably at least 70 mol% equivalents and most preferably at least 95 mol% equivalents (in each case based on the total amount of H-functional starter compounds). It is further preferred to continuously add alkylene oxide and carbon dioxide to the reactor. Part of the product mixture is continuously withdrawn from the reactor, so that the amount of product mixture contained in the reactor remains constant within certain limits.
- step ( ⁇ ) comprises a batchwise metered addition of the H-functional starter compound.
- the discontinuous addition of an H-functional initiator compound may include the addition of the H-functional initiator compound in one or more pulses or at a constant or varying rate of addition over time, while in step ( ⁇ ) one or more alkylene oxides and carbon dioxide are added Mixture is continuously dosed.
- the amount of the further H-functional starter compounds which are continuously metered into the reactor in step ( ⁇ ) is preferably at least 20 mol% equivalents, more preferably at least 70 mol% equivalents and most preferably at least 95 mol% equivalents (in each case based on the total amount of H-functional starter compounds).
- alkylene oxide and carbon dioxide are continuously fed to the reactor via the reaction time required to produce the desired molecular weight.
- the following procedure can be used:
- step (ßl) to the mixture of step (cd) under inert gas or an inert gas-carbon dioxide mixture (for example, argon-carbon dioxide mixture or nitrogen-carbon dioxide mixture) or under a pure carbon dioxide atmosphere, alkylene oxide at
- Temperatures of 90 to 150 ° C, preferably from 125 to 135 ° C was added, and then
- step ( ⁇ ) branching compound which are optionally dissolved in a solvent or one or more alkylene oxides, and continuously metering carbon dioxide into the mixture resulting from step ( ⁇ 1) ("adding branching compound"),
- step ( ⁇ ) one or more alkylene oxides and carbon dioxide to the mixture resulting from step ( ⁇ ) continuously dosed ("copolymerization").
- the steps ( ⁇ ) and ( ⁇ ) can be performed in this order ("early addition”) and in the reverse order ("late addition”). Preference is given to adding the branching compound after the activation phase and at the beginning of the actual polymerization ("early addition”).
- the steps ( ⁇ ) and (51) can also be carried out several times in any order.
- the width of the molecular weight distribution (polydispersity) of the higher-functionality polyethercarbonate polyols obtainable according to the invention can be lower with early addition of the branching compound than with a later addition.
- the polydispersity may be below 4.0 when added early and below 6.0 when added later.
- Preference is given to higher-functional polyethercarbonate polyols having a polydispersity of less than 2.5.
- the viscosity of the higher-functionality polyethercarbonate polyols according to the invention can be lower with early addition of the branching compound than with a later addition.
- steps ( ⁇ ) and (51) can be carried out in the reverse order. This process procedure can be particularly advantageous if higher-viscosity, higher-functional polyethercarbonate polyols having a broad
- step (a2) under an inert gas atmosphere (for example argon or nitrogen), under an atmosphere of an inert gas-carbon dioxide mixture or under a pure carbon dioxide atmosphere at temperatures of 90 to 150 ° C, preferably from 1 25 to 135 ° C, of the DMC - Catalyst and then the suspending agent containing no I I-functional groups, or the H-functional initiator compound added (ß2) to the mixture of step (a2) under inert gas or an inert gas-carbon dioxide mixture (for example, argon carbon dioxide Mixture or nitrogen-carbon dioxide mixture) or under a pure carbon dioxide atmosphere, alkylene oxide at temperatures of 90 to 150 ° C, preferably from 1 25 to 135 ° C was added, and then
- step (521) the H-functional initiator compound, a portion of the one or more alkylene oxides and carbon dioxide are continuously metered to the mixture resulting from step ( ⁇ 2) ("copolymerization"),
- step ( ⁇ 2) branching compound optionally dissolved in a solvent or in one or more alkylene oxides, and continuously metering carbon dioxide to the mixture resulting from step (521) ("adding branching compound"),
- step (522) continuously metering one or more alkylene oxides and carbon dioxide to the mixture resulting from step ( ⁇ ) ("copolymerization").
- the ratio of the amount of alkylene oxide in steps (521) and (522) in this embodiment determines the architecture of the resulting higher yielding polyethercarbonate polyols.
- the amount of alkylene oxide in step (521) may be small relative to the amount of alkylene oxide in step (522) ("early addition")
- the amount of alkylene oxide in step (521) may also be increased in proportion to the amount of alkylene oxide in step (522) ) be great (“late addition”).
- the The amount of alkylene oxide in step ( ⁇ 21) is small relative to the amount of alkylene oxide in step (522) ("early addition”).
- the ratio of the amount of alkylene oxide in step (521) to the amount of alkylene oxide in step (522) may be less than zero , 5, preferably less than 0.2
- Steps (521), ( ⁇ 2) and (522) can also be performed multiple times in any order.
- steps (521) and ( ⁇ 2) are parallel (simultaneous) to each other.
- step ( ⁇ 3) to the mixture of step (a3) under inert gas or an inert gas-carbon dioxide mixture (for example argon-carbon dioxide mixture or nitrogen-carbon dioxide mixture) or under a pure carbon dioxide atmosphere, alkylene oxide at temperatures of 90 to 150 ° C, preferably from 1 25 to 135 ° C was added, and then
- step ( ⁇ 3) branching compound which is optionally dissolved in a solvent or in one or more alkylene oxides, continuously dosed to the resulting from step (ß3) mixture ("adding branching compound").
- the addition of the compounds in steps ( ⁇ 3) and (53) can be started in any order.
- the addition of the H-functional initiator compound, one or more alkylene oxides and carbon dioxide is started in step (53) before the addition of the branching compound in step ( ⁇ 3) is started.
- the continuous metering of the branching compound in step ( ⁇ 3) and the H-functional initiator compound, one or more alkylene oxides and carbon dioxide in step (53) are preferably carried out in parallel (simultaneous) to each other in a continuous process.
- the steps ( ⁇ 3) and (53) can also be carried out alternately or in each case with repeated pulsewise addition of the components.
- Ethylene oxide and / or propylene oxide are used.
- the starting compound used is polyether polyols and / or oligomerized fatty acids (preferably hydrogenated).
- the catalyst is a DMC catalyst.
- the double metal cyanide compounds contained in the DMC catalysts which can preferably be used in the process according to the invention are the reaction products of water-soluble metal salts and water-soluble metal cyanide salts.
- Double metal cyanide (DMC) catalysts are known in the art for the homopolymerization of alkylene oxides (see, e.g., U.S. Patent Nos. 3,404,109, 3,329,505, 3,941,849, and 5,158,922). DMC catalysts, e.g. in US Pat. No.
- EP-A 700 949 5,470,813, EP-A 700 949, EP-A 743 093, EP A 761 708, WO 97/40086 A1, WO 98/16310 A1 and WO 00/47649 A1 have very high activity and allow the preparation of polyethercarbonate polyols at very low catalyst concentrations.
- a typical example is the highly active DMC catalysts described in EP-A 700 949 which, in addition to a double metal cyanide compound (eg zinc hexacyanocobaltate (III)) and an organic complex ligand (eg tert-butanol), also have a polyether with a number-average molecular weight greater than 500 g / mol.
- the DMC catalysts which can be used according to the invention are preferably obtained by:
- an aqueous solution of a metal salt with the aqueous solution of a metal cyanide salt in the presence of one or more organic complex ligands e.g. an ether or alcohol
- Normal pressure (1013 mbar) is dried, and wherein in the first step or immediately after the precipitation of Doppelmetallcyanidtell (second step) one or more organic complex ligands, preferably in excess (based on the DoppelmetallcyanidISS) and optionally further complex-forming components are added.
- an aqueous zinc chloride solution preferably in excess, based on the metal cyanide salt
- potassium hexacyanocobaltate is mixed, and then dimethoxyethane (glyme) or tert-butanol (preferably in excess, based on zinc hexacyanocobaltate) is added to the suspension formed.
- Metal salts suitable for preparing the double metal cyanide compounds preferably have a composition according to the following general formula:
- M is selected from the metal cations Zn 2+ , Fe 2+ , Ni 2+ , Mn 2+ , Co 2+ , Sr 2+ , Sn 2+ , Pb 2+ and
- M is Zn 2 * , Fe 2+ , Co 2+ or Ni 2+
- M is selected from the metal cations Fe 3+ , Al 3+ , Co 3+ and Cr 3+
- X are one or more (ie different) anions, preferably an anion selected from the group of halides ( fluoride, chloride, bromide, iodide), hydroxide, sulfate, carbonate, cyanate, thiocyanate, isocyanate, Isothiocyanate, carboxylate, oxalate and nitrate;
- halides ie fluoride, chloride, bromide , Iodide
- hydroxide sulfate, carbonate, cyanate, thiocyanate, isocyanate, isothiocyanate, carboxylate
- Halides ie fluoride, chloride, bromide, iodide
- hydroxide sulfate, carbonate, cyanate, thiocyanate, isocyan
- suitable metal salts are zinc chloride, zinc bromide, zinc iodide, zinc acetate, zinc acetylacetonate, zinc benzoate, zinc nitrate, iron (II) sulfate, iron (II) bromide, iron (II) chloride, iron (III) chloride, cobalt (II) chloride, Cobalt (II) thiocyanate, nickel (II) chloride and nickel (II) nitrate. It is also possible to use mixtures of different metal salts.
- Metal cyanide salts suitable for preparing the double metal cyanide compounds preferably have a composition according to the following general formula: wherein M 'is selected from one or more metal cations of the group consisting of Fe (II), Fe (III), Co (II), Co (III), Cr (II), Cr (III), Mn (II), Mn (III), Ir (III), Ni (II), R (III).
- Y is selected from one or more metal cations of the group consisting of alkali metal (ie Li + , Na + , K, Rb + and alkaline earth metal (ie Be 2+ , Mg " Ca 2" , Sr 2+ , Ba 2T ),
- A is selected from one or more anions of the group consisting of halides (ie fluoride, chloride, bromide, iodide), hydroxide, Sulfate, carbonate, cyanate, thiocyanate, cyanate, isothiocyanate, carboxylate, azide, oxalate or nitrate and a, b and c are integers, with the values for a, b and c chosen
- Suitable metal cyanide salts are sodium hexacyanocobaltate (III), potassium hexacyanocapaltate (III), potassium hexacyanoferrate (II), potassium hexacyanoferrate (III), calcium hexacyanocobitatate (III) and lithium hexacyanocobaltate (III).
- Preferred double metal cyanide compounds which are contained in the D MC catalysts which can be used according to the invention are compounds having a composition of the following general formula: wherein M and M 'are as defined above and x, x', y and z are integer and chosen to give the electron neutrality of the double metal cyanide compound.
- suitable double metal cyanide compounds a) are zinc hexacyanocobaltate (III), zinc hexacyanoiridate (III), zinc hexacyanoferrate (III) and cobalt (II) hexacyanocobaltate (III).
- suitable double metal cyanide compounds are e.g. US Pat. No. 5,158,922 (column 8, lines 29-66). Zinc hexacyanocobaltate (III) is particularly preferably used.
- organic complexing ligands added in the preparation of the DMC catalysts are described, for example, in US Pat. No. 5,158,922 (see in particular column 6, lines 9 to 65), US Pat. No. 3,404,109, US Pat. No. 3,829,505, US Pat. No. 3,941,849 and EP-A 700,949 EP-A 761 708, JP 4 145 123, US 5 470 813, EP-A 743 093 and WO-A 97/40086).
- water-soluble, organic compounds having heteroatoms, such as oxygen, nitrogen, phosphorus or sulfur, which can form complexes with the double metal cyanide compound are used as organic complex ligands.
- Preferred organic complexing ligands are alcohols.
- organic complex ligands are aliphatic ethers (such as dimethoxyethane), water-soluble aliphatic alcohols (such as ethanol, isopropanol, n-butanol, isobutanol, sec-butanol, tert-butyl).
- ethylene glycol mono-fer-butyl ether Diethylene glycol mono-f-butyl ether, tripropylene glycol mono-methyl ether and 3-methyl-3-oxetane-methanol
- Highly preferred organic complexing ligands are selected from one or more compounds of the group consisting of dimethoxyethane, tert-butanoi 2-methyl-3-buten-2-ol, 2-methyl-3-butyn-2-ol, ethylene glycol mono-finished butyl ether and 3-methyl-3-oxetan-methanol.
- one or more complex-forming component (s) from the compound classes of polyethers, polyesters, polycarbonates, polyalkylene glycol sorbitan esters, polyalkylene glycol glycidyl ethers, polyacrylamide, poly (acrylamide-co-acrylic acid), polyacrylic acid, poly (acrylic acid -co-maleic acid), polyacrylonitrile, polyalkyl acrylates, polyalkyl methacrylates, polyvinyl methyl ether, polyvinyl ether, polyvinyl acetate, polyvinyl alcohol, poly-N-vinylpyrrolidone, poly (N-vinylpyrrolidone-co-acrylic acid), polyvinyl methyl ketone, poly (4-vinylphenol), poly ( acrylic acid-co-styrene), oxazoline polymers, polyalkyleneimines, maleic and maleic anhydride copolymers, hydroxyethy
- the aqueous solutions of the metal salt are preferably used in the first step in stoichiometric excess (at least 50 mol%) based on the metal cyanide salt. This corresponds to at least a molar ratio of metal salt to metal cyanide salt of 2.25 to 1.00.
- the metal cyanide salt e.g., potassium hexa-cobaltate
- the organic complexing ligand e.g., tert-butanol
- the double metal cyanide compound e.g., zinc hexacyanocobaltate
- excess metal salt e.g., zinc hexacyanocobaltate
- the organic complex ligand can be present in the aqueous solution of the metal salt and / or the metal cyanide salt, or it is added directly to the suspension obtained after precipitation of the double metal cyanide compound. It has proven to be advantageous to mix the aqueous solutions of the metal salt and the metal cyanide salt, and the organic complex ligand with vigorous stirring.
- the suspension formed in the first step is subsequently treated with a further complex-forming component.
- the complex-forming component is preferably used in a mixture with water and organic complex ligands.
- a preferred method for carrying out the first Step is carried out using a mixing nozzle, more preferably using a jet disperser, as described for example in WO-A 01/39883.
- the isolation of the solid (ie the precursor of the catalyst according to the invention) from the suspension is carried out by known techniques, such as centrifugation or filtration.
- the isolated solid is subsequently washed in a third process step with an aqueous solution of the organic complex (for example by resuspending and subsequent reisolation by filtration or centrifugation).
- an aqueous solution of the organic complex for example, water-soluble by-products, such as potassium chloride, can be removed from the catalyst according to the invention.
- water-soluble by-products such as potassium chloride
- the amount of the organic complex ligand in the aqueous washing solution is between 40 and 80 wt .-%, based on the total solution.
- the aqueous washing solution is added to a further complex-forming component, preferably in the range between 0.5 and 5 wt .-%, based on the total solution.
- a first washing step (c-1) with an aqueous solution of the unsaturated alcohol is washed (eg by resuspension and subsequent reisolation by filtration or centrifugation), in order in this way, for example, water-soluble by-products, such as potassium chloride, from the catalyst of the invention remove.
- the amount of the unsaturated alcohol in the aqueous washing solution is between 40 and 80% by weight, based on the total solution of the first washing step.
- either the first washing step is repeated once or several times, preferably once to three times, or preferably, a non-aqueous solution, such as e.g. a mixture or solution of unsaturated alcohol and further complexing component (preferably in the range between 0.5 and 5 wt.%, Based on the total amount of the washing solution of step (c-2)), used as a washing solution and the solid once or more times , preferably washed once to three times.
- a non-aqueous solution such as e.g. a mixture or solution of unsaturated alcohol and further complexing component (preferably in the range between 0.5 and 5 wt.%, Based on the total amount of the washing solution of step (c-2)
- the isolated and optionally washed solid is then, optionally after pulverization, at temperatures of 20 - 100 ° C and at pressures of 0.1 mbar to atmospheric pressure
- the branching compound is selected from the group of the glycidyl alcohols, the oxetane alcohols, the monoglycidyl ethers of dioxins, the mono- or diglycidyl ethers of triols, the unsubstituted or substituted 3-hydroxyalkyloxetanes and / or the compounds according to the following
- Ar may be a divalent aromatic, araliphatic, cycloaliphatic or aliphatic radical having from 5 to 22 carbon atoms which may also contain heteroatoms such as oxygen or sulfur and n is a natural number from 1 to 10.
- glycidyl alcohols glycidol (2,3-epoxy-1-propanol) is preferred.
- 3-methyl-3-oxetane-methanol and ethyl-hydroxymethyloxetane are preferable.
- Suitable monoglycidyl ethers are monoglycidyl ethers of ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, neopentyl glycol, 1,4-butanediol, adipol, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, oligoethylene or propylene glycols having a molecular weight of from 300 to 1000 g / mol, octanediol, decanediol, dodecanediol, dimer fatty diol, 2-methyl-1,3-propanediol, cyclohexanedimethanol, TCD-diol, pinanediol, hydroquinone, resorcinol, bisphenol-F, bisphenol-A or ring-hydrogenated bisphenol-A.
- mono- or diglycidyl ethers of triols mono- or diglycidyl ethers of glycerol are preferred. These can also be used as a technical mixture, as shown for example by the following formula:
- isocyanates examples include 1,4-butylene diisocyanate, 1,5-pentane diisocyanate, 1,6-hexamethylene diisocyanate (H DD, isophorone diisocyanate (I DI), 2,2,4- and / or 2, 4,4-Trimethylhexamethylendiisocyanat, the isomeric bis (4,4'-isocyanatocyclohexyl) methanes or mixtures thereof any isomer content, 1, 4-cyclohexylene diisocyanate, 1, 4-phenylene diisocyanate, 2,4- and / or 2,6-toluene diisocyanate (TDI ), 1, 5-naphthylene diisocyanate, 2,2'-and / or 2,4'- and / or 4,4'-diphenylmethane diisocyanate (MDI) and / or higher homologs (polymeric MDI), 1,3- and / or l, 4-bis- (2-iso
- modified diisocyanates with uretdione, isocyanurate, urethane, carbodiimide, uretonimine, allophanate, biuret, amide, iminooxadiazinedione and / or oxadiazinetrione structure, and also unmodified polyisocyanate having more than 2 NCO groups.
- Groups per molecule such as 4-isocyanatomethyl-l, 8-octane diisocyanate (nonane triisocyanate) or triphenylmethane-4,4 ', 4 "triisocyanate are used.
- the isocyanate is a prepolymer which is obtainable by reaction of an isocyanate having an NCO functionality of> 2 and polyols having a molecular weight of> 62 g / mol to ⁇ 8000 g / mol and OH functionalities of> 1 , 5 to ⁇ 6.
- a further subject of the present invention is a polyethercarbonate polyol obtainable by a process according to the invention.
- the molecular weight of the polyethercarbonate polyols obtained may be at least 400 g / mol, preferably 400 to 000 ⁇ 00 g / mol, more preferably 500 to 60 ⁇ 00 g / mol, and most preferably 2 ⁇ 00 to 3 ⁇ 00 g / mol be. These molecular weight ranges, together with the controllable molecular geometry, can lead to suitable viscosities of the higher-functional polyether carbonate polyols.
- the lower viscosity compared to linear polyethercarbonate polyols of the branched polyethercarbonate polyols according to the invention improves the technical handling properties.
- the branched polyether according to the invention are characterized by a high reactivity towards Vernetzungsreagentien, such as isocyanates, which is expressed by shorter times to achieve the gel point.
- the polyethercarbonate polyols which can be prepared according to the invention can be used in washing and cleaning agent formulations, drilling fluids, fuel additives, ionic and nonionic surfactants, lubricants, process chemicals for paper or textile production, cosmetic formulations or as pore formers in the production of ceramics.
- polyethercarbonate polyols having controllable functionalities, molecular weight distributions and viscosities, which can advantageously be used in the abovementioned fields of application.
- the polyethercarbonate polyols to be used have to fulfill certain material properties, such as, for example, molecular weight, viscosity, functionality and / or hydroxyl number.
- polyether carbonate networks according to the invention which, depending on whether the service temperature is above or below the glass transition temperature, have an elastomer or duromer character.
- the elastomers may have the character of FonnMechn or of planar structures (coatings, films).
- another aspect of the invention is a crosslinked polyethercarbonate polymer obtainable by the previously described method of reacting the polyethercarbonate polyols with di- and / or polyisocyanates.
- the isocyanate-crosslinked polyethercarbonate polymers obtainable by this process can be characterized by simple process control in their preparation and improved mechanical properties. This is probably due to the higher functionality per crosslinkable polyethercarbonate polyol molecule compared to unbranched polyethercarbonate polymers.
- the controllable viscosity of the higher functional polyethercarbonate polyols can also be used to provide the lowest possible viscosity higher polyether polycarbonate polyols, which can lead to particularly fast-curing and homogeneous products.
- the crosslinked polyether carbonate polymers can be used in duromeric solids, viscoelastic foams or coatings.
- the higher-functional polyethercarbonate polyols obtainable by the process according to the invention can be processed without problems, in particular by reaction with di- and / or polyisocyanates to give polyurethanes, in particular flexible polyurethane foams, rigid polyurethane foams, polyurethane elastomers or polyurethane coatings.
- polyurethane applications it is possible to use preferably higher-functional polyethercarbonate polyols which have a functionality of at least 2, preferably at least 2.5, and particularly preferably at least 2.8.
- moldings or layers with an elastomer or duromer character can be produced in this way.
- moldings also include a layer comprising a crosslinked polyethercarbonate polymer.
- the layers which can be produced according to the invention can contribute to mechanical and chemical protection on shaped bodies and thus contribute to an increased service life of workpieces. Due to the high functionality and controllable viscosity, these layers can be produced quickly and uniformly on shaped bodies.
- H-functional starter compounds PET-1: Bifunctional polypropylene glycol with an OH number of 257 mg / g
- PET -2 Tri functional polypropylene glycol with an OH number of 400 mgKon / g
- Dimer fatty acid bifunctional hydrogenated dimer fatty acid having an acid number of 197 mg / g, CAS 68783-41-5
- the DMC catalyst was prepared according to Example 6 of WO-A 01/80994.
- the polyethercarbonate polyol which on the one hand contains the following polycarbonate units resulted in the copolymerization:
- polyether units shown below contain:
- the characterization of the reaction mixture was carried out by ⁇ -NMR spectroscopy (determination of the content of unreacted propylene oxide and cyclic carbonate).
- the reaction mixture was diluted with dichloromethane (20 ml) and the solution passed through a falling film evaporator.
- the solution (0.1 kg in 3 h) ran down the inner wall of a 70 mm diameter, 200 mm long, externally heated tube at 120 ° C with the reaction mixture passing through three rotating rollers at a speed of 250 rpm with 10 mm diameter was evenly distributed as a thin film on the inner wall of the falling film evaporator.
- a pressure of 3 mbar was set by means of a pump.
- Volatile constituents (unreacted alkylene oxides, cyclic carbonate, solvent) purified reaction mixture was collected at the bottom of the heated tube in a receiver.
- the product mixture obtained was ! H-NMR spectroscopy (determination of the CO content in the polymer) and gel permeation chromatography and determination of the OH number, the viscosity and the gel point characterized.
- the weight and number average molecular weights of the resulting polymers were determined by gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- the procedure was according to DIN 55672-1: "Gel Permeation Chromatography, Part 1 - Tetrahydrofuran as Eluent” (SECurity C system from PSS Polymer Service, flow rate 1.0 ml / min, columns: 2xPSS SDV linear M, 8 ⁇ 300 mm, 5 ⁇ m, RI D -Detector).
- polystyrene samples of known molecular weight were used for calibration.
- the weight and number average molecular weight of the resulting polymers were determined on the basis of DIN 53240-2, but using N-methylpyrrolidone instead of THF / dichloromethane as the solvent. It was titrated with 0.5 molar ethanolic KOH solution (endpoint detection by potentiometry). Castor oil was used as the test substance, with the OH number specified by the certificate.
- the unit in "mg / g” refers to mg [KOH] / g [polyethercarbonate polyol]
- the ratio of the amount of cyclic propylene carbonate to polyethercarbonate polyol (selectivity) and the molar ratio of carbonate groups to ether groups in the polyethercarbonate polyol (ratio e / f ) and the proportion of propylene oxide reacted (C in mol%) were determined by means of ! HN R spectroscopy and the sample was dissolved in deuterated chloroform and measured on a Bruker spectrometer (AV400, 400 MHz).
- the viscosity of the product mixture was determined using a Physica MC R 501 rheometer manufactured by Anton Paar at 30 ° C., using a Kugei plate configuration with a diameter of 25 mm with a spacing of 0.05 mm between the sphere and the plate. The shear rate was increased within 10 minutes from 0.01 to 1000 1 / s. Every 10 s, a value was taken. The viscosity is given as the average of the total of 60 measured values.
- the polyether carbonate polyols were mixed with an equimolar amount of Desmodur N3300 (hexamethylene diisocyanate trimer) and 2000 ppm dibutyltin laurate (2% in diphenyl ether).
- Example 1 Preparation of a branched polyether carbonate polyol of computational functionality of 3.0, starting from a starting compound of the functionality of 2.0 using gl cidol as branching compound to increase the functionality
- step (a) In a 300 ml pressure reactor equipped with Gaseintragsrrounder a mixture of DMC catalyst (32 mg) and PET! (17.4 g) and stirred for 30 min at 130 ° C under a slight vacuum (50 mbar) and light Ar stream stirred (800 rpm) [step (a)]. There were 15 bar O: pressed, causing the temperature in the reactor dropped slightly. The temperature was readjusted to 130 ° C and maintained during the subsequent steps, the pressure in the reactor by metering in CO at 15 bar. 1.75 g of propylene oxide were metered in with the aid of an HPLC pump (1 ml / min) and the reaction mixture was stirred for 20 min (800 rpm).
- the molar ratio of the rate of addition of propylene oxide to the rate of addition of glycidol was 31.8.
- the selectivity c / 1 was 0.08.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 24.02 / 75.98.
- the OH number of the obtained mixture was 35.8 mgKon / g.
- the viscosity of the resulting mixture was 5351 mPa s.
- the time to reach the gel point was 15.1 min.
- a mixture of DMC catalyst (32 mg) and PET-1 (17.4 g) was placed in a 300 ml pressure reactor equipped with a gas introduction stirrer and stirred at 130 ° C. for 30 min under a slight vacuum (50 mbar) and a slight flow of Ar (800 rpm) [step (a)]. There were 15 bar C O; pressed, whereby the Tem eratur in the reactor decreased slightly. The temperature was readjusted to 130 ° C and maintained during the subsequent steps, the pressure in the reactor by metering in CO: at 15 bar. 1.75 g of propylene oxide were metered in with the aid of an HPLC pump (1 ml / min) and the reaction mixture was stirred for 20 min (800 rpm).
- the selectivity c / 1 was 0.13.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 79.8 / 20.2.
- the OH number of the resulting mixture was 60.9 mgKOH / g.
- the viscosity of the resulting mixture was 3856 mPa s.
- the time to reach the gel point was 10.0 min.
- the temperature was controlled at 100 ° C and during the subsequent steps, the pressure in the reactor by metering in C O; kept at 15 bar. After reaching 100 ° C., another 1 22.5 g of propylene oxide were metered in via an HPLC pump (1.00 ml / min) with stirring, the reaction mixture also being stirred (800 rpm). Fifteen minutes after the start of the addition of propylene oxide, 14.90 g of glycidol were metered in via a separate H LC pump (0.15 mL / min) with stirring. [Step ( ⁇ )]. After the end of the addition of propylene oxide and glycidol, the reaction mixture was stirred at 100 ° C for a further 2 h. By cooling the reactor in an ice bath, the reaction was stopped, the pressure was released and the resulting product was analyzed. The molar ratio of the rate of addition of propylene oxide to the rate of addition of glycidol was 6.4.
- the selectivity c / 1 was 0.14.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 15.8 / 84.2.
- the OH number of the obtained mixture was 91.7 mgKon / g.
- the viscosity of the resulting mixture was 2167 mPa s.
- Example 4 (Comparative Example): Preparation of a linear polyether carbonate having a functionality of 2
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 18.3 / 81, 7.
- the OH number of the resulting mixture was 31.8 mgKon / g.
- the viscosity of the resulting mixture was 8159 mPa s.
- the time to reach the gel point was 21, 6 min.
- a comparison of Examples 1-3 with Comparative Example 4 shows that the branched polyethercarbonate polyols of Examples 1-3 prepared using glycidol have lower viscosity and higher reactivity compared to the bifunctional polyethercarbonate diol of Example 4 having crosslinking with isocyanates. Surprisingly, as the content of the branching compound (higher functionality) increases, the viscosity decreases while the reactivity increases.
- Example 5 Preparation of a branched polyethercarbonate polyol of computational functionality of 2.8, starting from a starting compound of functionality 2.0 using glycidol as branching compound to increase functionality
- a 300 ml pressure reactor equipped with Gaseintragsrlocher was a mixture of DMC catalyst (24 mg), ET-! (17.4 g) and stirred for 30 min at 130 ° C under a slight vacuum (50 mbar) and a slight flow of Ar stirred (800 rpm) [step (a)].
- step (a) There were 15 bar CO; pressed, whereby the temperature in the reactor dropped slightly. The temperature was readjusted to 130 ° C and maintained during the subsequent steps, the pressure in the reactor by metering in CO .: at 15 bar.
- the molar ratio of the rate of addition of propylene oxide to the rate of addition of glycidol was 10.6.
- the selectivity c / i was 0.07.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 19.3 / 80.7.
- the OH number of the obtained mixture was 57.3 mgKOH / g.
- the viscosity of the resulting mixture was 2330 mPa s.
- the time to reach the gel point was 7.1 min.
- Example 6 (comparative example): Preparation of a polyether carbonate having a functionality of 2.8, starting from a mixture of starter compounds having the functionality 2.0 and 3.0
- the selectivity c / 1 was 0.1.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 16.7 / 83.3.
- the OH number of the obtained mixture was 52.0 mgKon / g.
- the viscosity of the resulting mixture was 391 ImPa s.
- the time to reach the gel point was 8.2 min.
- Example 5 A comparison of Example 5 with Comparative Example 6 shows that the branched polyethercarbonate polyols of Example 5 prepared using glycidol have a lower viscosity compared to the mixture of Example 6 prepared using starter compounds of different functionality has a higher reactivity in crosslinking with isocyanates.
- Example 7 Preparation of a branched polyether carbonate polyol of computational functionality of 3.0, starting from a 2.0 functional starter compound employing glycidol as a branching compound to increase functionality.
- a pressure reactor equipped with gas introduction stirrer, a mixture of DMC catalyst (22 mg) and PET-1 (17.4 g) and stirred for 30 min at 130 ° C under a slight vacuum (50 mbar) and a slight flow of Ar stirred (800 rpm) [step (a)].
- step (a) There were 15 bar O .: pressed, causing the temperature in the reactor dropped slightly. The temperature was readjusted to 130 ° C and during the subsequent steps, the pressure in the reactor by addition of C O; kept at 15 bar.
- the selectivity c / 1 was 0.07.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 18.8 / 81.2.
- the OH number of the obtained mixture was 60.7 mgKon / g.
- the viscosity of the resulting mixture was 2430 mPa s.
- Step Example! 8 (Comparative): Preparation of a polyether carbonate having a functionality of 3 using a trifunctional starter compound
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 18.4 / 81, 6.
- the OH number of the resulting mixture was 57.1 mgKon / g.
- the viscosity of the resulting mixture was 2969 mPa s.
- the time to reach the gel point was 6.3 minutes.
- Example 7 shows that the branched polyether carbonate polyol of Example 7 prepared using glycidol has a lower viscosity compared to the blend of Example 8 prepared using starter compounds of different functionality has a higher reactivity in crosslinking with isocyanates.
- Example 9 (Comparative): Preparation of a branched polyethercarbonate polyol of computational functionality of 3.0, starting from a 2.0 functional starter compound employing glycidol as a branching compound to increase functionality at increased rate of addition of glycidol during step ( ⁇ ).
- a mixture of DMC catalyst (32 mg) and PET-1 (17.4 g) was placed in a 300 ml pressure reactor equipped with a gas introduction stirrer and stirred at 130 ° C. for 30 min under a slight vacuum (50 mbar) and a slight flow of Ar (800 rpm) [step (a)]. There were 15 bar CO. Pressed, whereby the temperature in the reactor dropped slightly. The temperature was readjusted to 130 ° C and maintained during the subsequent steps, the pressure in the reactor by metering in C O- at 15 bar. 1.75 g of propylene oxide were metered in with the aid of an HPLC pump (1 ml / min) and the reaction mixture was stirred for 20 min (800 rpm).
- the molar ratio of the rate of addition of propylene oxide to the rate of addition of glycidol was 0.1.
- the amount of glycidol metered in at the time the glycidol addition was terminated was 7.8% by weight (2.98 g glycidol based on the sum of 17.4 g starter compound, 3 times 1.75 g propylene oxide , 12.7 g of propylene oxide from step ( ⁇ ) and 2.98 g of glycidol).
- Example 10 (Comparative Example): Preparation of a branched polyethercarbonate polyol of computational functionality of 3.0, starting from a 2.0 functionality starting compound using glycidol as a branching compound to increase functionality with the addition of glycidol during step ( ⁇ ) in a 300 ml pressure reactor equipped with Gaseintragsrrocker a mixture of DMC catalyst (32 mg) and PET-1 (17.4 g) was added and stirred for 30 min at 130 ° C under a slight vacuum (50 mbar) and light Ar stream (800 rpm) [step (a)]. There were 1 5 bar CO 2 pressed, whereby the temperature in the reactor dropped slightly.
- the temperature was readjusted to 130 ° C and during the subsequent steps, the pressure in the reactor by addition of CO. kept at 15 bar.
- 1.75 g of propylene oxide were metered using a HPLC pump (1 mL / min) and 0.98 g of glycidol via a separate HPLC pump (0.43 mL / min) and the reaction mixture was stirred for 20 min (800 rpm). Occurrence of a momentarily increased heat development in the reactor during this time indicated the activation of the catalyst.
- Glycidol was added in step ( ⁇ ).
- the molar ratio of the rate of addition of propylene oxide to the rate of addition of glycidol was 2.2.
- step (ß) The amount of added glycidol at the end of step (ß) was 1 1, 5 wt .-% (3 times 0.98 g of glycidol based on the sum of 17.4 g of starter compound, 3 times 1.75 g of propylene oxide and 3 times 0.98 g glycidol).
- Comparative Example A comparison of Example 7 with Comparative Example 10 shows that no product is obtained on addition of the glycidol during the activation phase of the catalyst (step ( ⁇ )).
- Example 11 Preparation of a computational functionality branched polycarbonate polyol of 3.0, starting from a 2.0 functionality starting compound employing glycidol as a branching compound to increase functionality without the addition of an alkylene oxide
- step (a) In a 300 ml pressure reactor equipped with Gaseintragsrrounder a mixture of DMC catalyst (32 mg) and PET! (17.4 g) and stirred for 30 min at 130 ° C under a slight vacuum (50 mbar) and light Ar stream stirred (800 rpm) [step (a)]. 15 bar of CO2 were pressed on, causing the temperature in the reactor to drop slightly. The temperature was readjusted to 130 ° C and maintained during the subsequent steps, the pressure in the reactor by metering in CO: at 15 bar. 0.18 g of glycidol were metered with the aid of an HPLC pump (0.03 ml / min) and the reaction mixture was stirred for 20 min (800 rpm).
- step ( ⁇ ) The amount of glycidol added at the end of step ( ⁇ ) was 14.6% by weight (3 times 0.18 g plus 2.44 g glycidol based on the sum of 17.4 g starter compound and 3 times 0.18 g plus 2.44 g glycidol).
- the M R spectroscopic examination of the reaction mixture showed that the glycidol used was unreacted.
- Example 7 shows that when glycidol is used without the simultaneous addition of an alkylene oxide, no product is obtained.
- Step Example! Figure 12: Preparation of a branched polyethercarbonate polyol of the computational functionality of 4 starting from a 2.0 starting functionality starting compound using glycerol diglycidyl ether as a branching compound to increase functionality
- a mixture of DMC catalyst (26 mg) and PET-1 (17.4 g) was placed in a 300 ml pressure reactor equipped with a gas inlet stirrer and stirred at 130 ° C. for 30 min under a slight vacuum (50 mbar) and a slight flow of Ar (800 rpm) [step (a)].
- 1.75 g of propylene oxide were metered in with the aid of an HPLC pump (1 ml / min) and the reaction mixture was stirred for 20 min (800 rpm).
- the molar ratio of the rate of addition of propylene oxide to the rate of addition of glycerol diglycidyl ether was 28.2.
- the selectivity c / 1 was 0.06.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 22.5 / 77.5.
- the OH number of the obtained mixture was 31.3 mgKOH / g.
- the viscosity of the resulting mixture was 19700 mPa s.
- Step Example! 13 Preparation of a branched polyethercarbonate polyol of the computational functionality of 3, starting from a starting compound of the functionality of 2.0 using 3-ethyl-3-oxetanemethano! as a branching compound to increase functionality
- the molar ratio of the rate of addition of propylene oxide to the rate of addition of 3-ethyl-3-oxetanemethanol was 18.1. There was no accumulation of 3-ethyl-3-oxetanemethanol in the reaction mixture.
- the selectivity c / 1 was 0.1 1.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 18.5 / 81, 5.
- the OH number of the obtained mixture was 40.1 mg oti / g.
- the viscosity of the resulting mixture was 2423 mPa s.
- Example 14 Preparation of a branched polyether carbonate polymer of the computational functionality of 3.0, starting from a difunctional acid as starter compound using glycidol as branching compound to increase the functionality
- a mixture of DMC catalyst (120 mg) and hydrogenated dimer fatty acid (22.8 g) was placed in a 300 ml pressure reactor equipped with a gas introduction stirrer and stirred at 130 ° C. for 45 min under a slight vacuum (50 mbar) and a slight flow of Ar ( 800 rpm) [step (a)].
- 2.3 g of propylene oxide were metered in with the aid of an HPLC pump (1 ml / min) and the reaction mixture was stirred for 20 min (800 rpm).
- the molar ratio of the rate of addition of propylene oxide to the rate of addition of glycidol was 10.6.
- the selectivity c / 1 was 0.38.
- the molar ratio of carbonate groups to ether groups in the polymer e / f was 16.7 / 83.3.
- the OH number of the resulting mixture was 47.6 mg OH / g.
- the viscosity of the resulting mixture was 3577 mPa s.
- the time to reach the gel point was 12.7 min.
- Examples 7, 12-14 show that branched polyethercarbonates of different functionality can be obtained using different initiator compounds and different branching compounds.
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Abstract
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| PCT/EP2014/069578 WO2015039981A1 (de) | 2013-09-20 | 2014-09-15 | Verzweigte polyethercarbonatpolyole und verfahren zu deren herstellung |
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| EP3483198A4 (de) * | 2016-07-08 | 2020-01-08 | National University Corporation Tokyo University of Agriculture and Technology | Neuartiges aliphatisches polycarbonat und bindemittelharzzusammensetzung mit besagtem polycarbonat |
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| DE19905611A1 (de) | 1999-02-11 | 2000-08-17 | Bayer Ag | Doppelmetallcyanid-Katalysatoren für die Herstellung von Polyetherpolyolen |
| AUPQ056099A0 (en) | 1999-05-25 | 1999-06-17 | Silverbrook Research Pty Ltd | A method and apparatus (pprint01) |
| DE19958355A1 (de) | 1999-12-03 | 2001-06-07 | Bayer Ag | Verfahren zur Herstellung von DMC-Katalysatoren |
| DE19960776A1 (de) * | 1999-12-16 | 2001-06-21 | Bayer Ag | Polyethercarbonate |
| CZ20023475A3 (cs) | 2000-04-20 | 2003-02-12 | Bayer Aktiengesellschaft | Způsob výroby DMC-katalyzátorů |
| DE10219028A1 (de) | 2002-04-29 | 2003-11-06 | Bayer Ag | Herstellung und Verwendung von hochmolekularen aliphatischen Polycarbonaten |
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| WO2007148383A1 (ja) * | 2006-06-20 | 2007-12-27 | Dic Corporation | 多分岐ポリエーテルポリオール及びウレタン系樹脂組成物 |
| ES2358861T5 (es) * | 2007-01-30 | 2014-12-10 | Basf Se | Procedimiento para la obtención de polioles de polietercarbonato |
| KR101432506B1 (ko) * | 2010-09-09 | 2014-08-21 | 에스케이이노베이션 주식회사 | 교차연결된 분자량이 큰 사슬을 포함하는 폴리(알킬렌 카보네이트)의 제조 방법 |
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-
2013
- 2013-09-20 EP EP13185411.9A patent/EP2851384A1/de not_active Withdrawn
-
2014
- 2014-09-15 WO PCT/EP2014/069578 patent/WO2015039981A1/de not_active Ceased
- 2014-09-15 EP EP14771243.4A patent/EP3046947B1/de not_active Not-in-force
- 2014-09-15 CN CN201480062768.XA patent/CN105899572B/zh not_active Expired - Fee Related
- 2014-09-15 US US15/022,714 patent/US20160229955A1/en not_active Abandoned
-
2016
- 2016-03-15 SA SA516370740A patent/SA516370740B1/ar unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2015039981A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| SA516370740B1 (ar) | 2017-10-11 |
| CN105899572A (zh) | 2016-08-24 |
| WO2015039981A1 (de) | 2015-03-26 |
| EP3046947B1 (de) | 2017-10-25 |
| US20160229955A1 (en) | 2016-08-11 |
| CN105899572B (zh) | 2018-12-28 |
| EP2851384A1 (de) | 2015-03-25 |
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